Governor.



PATENTEDJUNB 2, 1903.

` No. 729,588 Y -W. P. O'BRIBN.

wGoVBRNoB. APPLICATION FILED DEO. 1:3, 1902.

, 2 SHEETS-SHEET 1` No MODEL.

/N VENTOH Tus ohms Evans cn, Moraumu.. wnswmc'ron. u. c.

PATBNTED VJUNE. 2, y1903. l

W.` P. OBRIEN.

GOVERNOR.

APPLIUAT'IONPILED DEG. 1a. 1902.

z SHEETS-SHEET 2.

N0 MODEL.

`/NVENTOH ATTORNEY Tn: Nonms PETERS ou, moraurno., wAsmNcroM n. c,

UNITED STATES Patented .Tune 2, 1903.

PATENT OFFICE.V

GOVERNOR.

sPEGIFICATroN forming part of Letters Patent No. 729,888, dated .Tune 2, 1903.

Application filed Decemteriaieoz. seriai'ro. 135,167. Nomar T 1r/ZZ whom, it may con/cern:

Be it known that I, WILLIAM I). OBRIEN, a citizen of thel United States, residing at Indianapolis, in the county of Marion and State of Indiana, have invented new and useful Improvements in Governors, of which the following is a specification.

My invention relates to certain `new and useful improvements in steam-engine governors, commonly known as throttling-governors; and it consists in a means situated between the governing means and the valve whereby the valve may be adjusted or set to increase or diminish the initial opening thereof, which operation may be performed without affecting the operation of the other mechanism connected to the valve-controlling means, as will be hereinafter more fully set forth.

The objects of my invention are, first, to provide a governor capable of regulating the speed of the engine to which it is applied under all conditions of loading; second, in addition to providing means whereby the throw of the valve may be adjusted inde-` pendently of the throw of the governor-balls or the speed-controlled means-that is to say,

for a given radial movement of the governor`` balls-the valve-throw may be greater or less; to also provide means whereby theinitial opening of said valve may be increased or diminished independently of and without affecting the operationof the means for varying the throw of the valve. I attain these objects by means of the mechanism illustrated in the accompanying drawings, in which similar numerals of referencev designate like parts throughout the several views.

Figure 1 is a vertical sectional elevational view taken through the line a b (see Fig. 3) and showing the governor-balls and the valve thereof in their normal positions. Fig. 2 is a similar sectional view, showing the valve raised to increase the area of opening thereof. Fig. 3 is a sectional plan viewof the governor, taken through the line c d. (See Figs. 1, 2, and 4.) Fig. 4 is a side elevational view of the governor, showing the driving-pulley and the speed-adjusting means thereof. Fig. 5 is an enlarged detail view of the mechanism whereby the throw of the valve is varied and also showing the means whereby the area ofthe opening of the valve may be either increased or diminished without affecting the operation i `of the mechanism for varying the/throw of the valve. Fig. 6 is an enlarged detailed view of the cross-head of the valve-stem and looking in the direction of the arrow a. (See Fig. 5.) Fig. '7 is an enlarged detail plan View of the valve-stein lever, and Fig. 8 is an enlarged detail side elevational view of the connecting-link looking in the direction of the arrow b. (See Fig. 5.)

Referringto the drawings, 1 designatesthe usual valve-chamber of af governor, having the valve-seats 2, provided with the balanced valve The stem 4 of the said valve passes Vthrough the stuiiing-box 5, formed integral on the cap 6 and the gland cap-nut 7, screwed on said stuffing-box 5. The uprights 8 are either formed integral on the caps 6 or are secured thereto, and the said uprights are connected at their top ends by the connecting-piece 9, formed integral on said top ends. To the top side of the connecting-piece 9 is secured the vertically-extending tubular stem 10, and through this stem extends the upper stem 11. The gear 12, havingthe extended sleeve 13, .is revolubly mounted on `the lower portion of said stem 10, and the said gear 12 meshes with the gear 14, which latter isv se cured on the shaft 15 to turn therewith. The shaft -15 is supported by a bearing 16, carried by one of the uprights S. Theband-pulley 17` is secured on the outer overhanging end ofthe shaft 15, which pulley is connected by a suitable belt to some revolving piece of the engine to be driven thereby. On the sleeve portion 13 of the gear 12 is either secured to or'formed integral thereon the head 18, to which the bottom ends of the governor-sprin gs 19 are secured, and said springs are secured at their top ends to the head 20, which is mounted on the top end of the tubular stem 10 to be revoluble and movable longitudi-y nally thereon. The gear 12 and all the parts connected thereto are held in position bythe collar 23, which is secured to the tubular stem 10 to contact with the top end of the 4 sleeve 13. Suitable balls 21 or other weights are secured to each of the springs 19 intermediate the ends thereof, and the said balls are each provided with suitable stops 22, which contact with the stem 10 when the governor is not in operation. The upper stem ll. extends upwardly through the cross-piece 9 and into the tubular stem lO to contact at its top end with the cap-nut 24, and said stem 11 has its bottom end projecting beneath the cross-piece 9 and to which is secured, to be adjustable in a vertical direction thereon, the cross-head 25.

A shaft 26 is mounted in bearings 27 and 28, and4 at one end of said shaft, adjacent to the bearing 28 thereof, is secured the leverarm 29, the rounded free ends of which-lit in between the collars 30 of the cross-head 31, which latter is adj ustably secured on the top end of the valve-stem 4 to be adjusted vertically thereon. On the opposite end of the shaft 26 is mounted adjacent to the bearing 27 the worin-gear 32, which meshes with the worm 33, mounted to turn in its bearing 34. A thumb-piece 35 is formed integral on the end of said worm 33, and on the threaded end of the stem 36 of said worm is provided a thumb jam-nut 37, by means of which latter the worm is held in its adjusted position. A coil-spring 37S surrounds the shaft 26 and has one of its ends secured to the side of the worm-wheel 32 and its opposite end adapted to engage the notch 38, formed in the hub 39 of the lever-arm 29, so that when the worm 33 is rotated to turn the worm-wheel 32 on its shaft, and thereby create a greater or lesser tension on the coil-spring 37 S to be applied to the arm 29 to force the upper stem ll with either a greater or lesser degree of tension or pressure against the top cap-nut 24 to counteract the centrifugal force of the governing means to that extent to produce the required degree of regularity and speed.

A pin 4() is carried by the lugs 4l, formed integral on the uprights 8, and mounted on said pin between said lugs is the arm 42, which has its rounded ends adapted to iit between the collars 43 of the cross-head 25, between which they work. Having now described those elements of mechanism that usually enter into the construction of this class of governor, l will now proceed to describe those elements of mechanism that constitute this my invention.

From the hub 44 of the upper arm 42, which latter is preferably formed integral with the former, and intermediate the top and bottom edges of said arc-formed arm 46, are drilled the pinholes 47, the centers of which fall in the line of the same arc, as shown particularly in Fig. 5. Integral on the hub 39 of the arm 29 is formed the bifurcated arm 48, which when said arm 29 is placed in position is situated directly beneath and in the same plane as the arc-formed arm 46. A connecting-rod 49 has its top bifurcated end .50 adapted to lit over the sides of the arc-formed arm 46, (see Fig. 5,) and a pin 5l connects said bifurcated arm 50 with said arc-formed arm 46. The bifurcated arm 4S is drilled to receive the pin 52, and the said pin 52 is situated in such position on said arm 48 relatively to the arcformed arm 46 so that when it is required to increase or diminish the area of opening of the valve 3 the center from which the arc is describedi. e. the center of the pin 52-will not deviate sufficiently from the center of the arc described through the pinholes 47 of the arc-formed lever-arm 46 when the latter is in its normal or working position to be appreciable or perceptibly affect or change the position of said valve 3 from its set or adjusted position, and thus when the bifurcated end 50 of the extensible connecting-rod 49 is connected to the extreme end of said arc-formed arm 46 or any intermediate point thereof when the latter is in its normal Working position the valve position will not be aiected thereby. (See particularly Fig. 5.) The pin 52 is drilled transversely to receive the threaded end 53 ofthe connecting-link 49, and screwed on said end 53 are the' adj Listing-nuts 54 and 55, by means of which the distance between the arcformed arm 46 and the arm 48 is increased or diminished, according as it is required to increase or diminish the area of the opening of the valve 3.

The operation of the device is as follows: The governor is applied to an engine in the usual manner, and the pulley 17 is connected by a suitable belt to some rotative piece of the engine, and the governor is set to run the engine at the rated or required speed per minute. The top end 50 of the link 49 is iirst moved into position opposite the pinhole 47 of the arc-formed lever 46 nearer to the pivotal center thereof, and is connected thereto by the pin 5l, in which position of said link the radial distance from the pivotal center of the arc-formed arm 46 to the lirst pinhole 47 will be equal to the distance from the pivotal center of the lever-arm 48 to the center of the pin 52, and consequently the movement or throw of each of the lever-arms will be substantially the same, so that for a given movement of the stem ll a like movement will be imparted to the stem 4. Suppose, for instance, that the load on the engine is intermittent and the engine does not respond promptly to the conditions of sudden changes of loadthat is, from a light load to a suddenly-applied weightier load, and vice versa-this indicates that the governor is not sufficiently sensitive and does not move the governorvalve 3 sufficiently and rapidly enough in either direction to supply the engine with the proper amount of steam at the proper time. Then to correct this irregularity the top bifurcated end 50 of the link 49 is moved outwardly or toward the outer end of the arcformed arm 46 and the pin 5l is inserted in the hole corresponding with the position of the end 50 of the link 49, and by this means the throw or travel of the valve 3 is increased for the same movement of the governor-balls 2l. If the engine is working under a very heavy and intermittent load, then, in addition to the le ver adjustment described, it becomes necessary under such conditions to increase IOO IIO

54 and 55 downwardly to move the lever-arms 48 and 29 to raise the'valve 3, as shown in dotted lines in Fig. 5. On the contrary, when the engine is operating under a light intermittent or suddenly-varying load and it is found that the engine is inclined to ra-ce, which would indicate that the governor is too sensitive, the initial opening of the valve 3 is first adj usted gradually to a lesser opening to suit the load under which the engine is working by the means previously described, and after such adjustment if it is found that the engine is still inclined to race this would' indicate that the governor is too sensitive. To remove this irregularity, all that is necessary to be'done is to move and connect the top end 50 of the link 49 to some one of the pinholes 47 nearer to the pivotal center of the lever-arm 46, thereby reducing the throw of the valve 3 in either direction, and thus the governor is rendered less sensitive, and thus it will be readily understood the said valve 3 may be adjusted and regulated by the means above described to all conditions and circumstances of loading,whether excessively light or heavy and intermittent, in proportion to the capacity of the engine.

Having thus fully described this my invention, what I claim as new and useful, and desire to cover by Letters Patent of the United States therefor, is-

1. In a governor, the combination with a 'valve-rod and a revolving speed-controlled means, of alever connected to said speed-controlled means, a second Vlever connected to said valve-rod, and extensible means connecting the said second lever to the first lever.

2. -In a governor, the combination with `a valve-rod and a revolving speed-controlled means, of a lever comprising a pair of arms, one of said arms connected to the speed-controlled` means, a second lever comprising a pair ofarms, one of said arms connected to the valve-rod, and an extensible link connecting-the opposite arm of the second lever to the other arm of the :first lever.

3. In a governor, the combination with the valve and the governor-balls, of a lever having one end adjustably connected with said valve, a second lever, an extensible link card ried by the arm of the first lever and adjust-v ably connected with one arm'of the second lever whereby the throw of the valve and the initial opening of the same may beincreased or diminished, the one independently of the other, a stem adjustably` connected to the other arm of .the second lever and a spring engaging said first lever in position to open the valve and to hold the stem in engagement with the governor-balls.

4. In a governor, the combination with the valve and the governor-balls, of a lever having one arm adjustably connected with said valve, a second lever, an extensible link car-4 ried by Vthe other arm of the first lever and adj ustably connected with one arm of the sec-A ond lever whereby the throw of the valve and the initial opening of the saine may be in'- creased or diminished, the one independently of the other, a stem adjust-ably connected to the arm of the second lever, a spring engag ing said first lever in position to yopen said valve and to hold said stem in engagement with the governor-balls and means for adjust; ing the tension of said spring, substantially as and for the purpose set forth.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

W'ILLIAM P. OBRIEN.

Vitnesses THOMPSON R. BELL, ARTHUR I-I. RAPP. 

